Consolidated Statements of Income - USD ($)	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017
Consolidated Statements of Income [Abstract]
Net sales	$ 234,275,463	$ 204,239,613
Cost of products sold	(175,550,418)	(154,382,737)
Gross margin	58,725,045	49,856,876
Product development expenses	(6,950,969)	(5,622,829)
Selling and administrative expenses	(33,914,735)	(32,151,289)
Operating profit	17,859,341	12,082,758
Interest expense	(1,202,272)	(976,512)
Other income	933,260	348,696
Income before income taxes	17,590,329	11,454,942
Income taxes	3,084,392	6,409,687
Net income	$ 14,505,937	$ 5,045,255
Earnings per Share:
Basic (in dollars per share)	$ 2.32	$ 0.81
Diluted (in dollars per share)	$ 2.31	$ 0.80